21634100205716 has 24 divisors (see below), whose sum is σ = 40310663238720. Its totient is φ = 10123877316992.

The previous prime is 21634100205713. The next prime is 21634100205721. The reversal of 21634100205716 is 61750200143612.

It is a super-2 number, since 2×21634100205716² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21634100205716.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21634100205713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 888670880 + ... + 888695223.

It is an arithmetic number, because the mean of its divisors is an integer number (1679610968280).

Almost surely, 2^{21634100205716} is an apocalyptic number.

It is an amenable number.

21634100205716 is a deficient number, since it is larger than the sum of its proper divisors (18676563033004).

21634100205716 is a wasteful number, since it uses less digits than its factorization.

21634100205716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777366303 (or 1777366301 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 21634100205716 in words is "twenty-one trillion, six hundred thirty-four billion, one hundred million, two hundred five thousand, seven hundred sixteen".